"January 1981."
"Submitted to U.S. Dept. of Interior, Bureau of Land Management, Wyoming State Office."
Includes bibliographical references (p. 75-78).
Data sources by sector : p. 27-31.
"The work upon which this report is based was supported by funds provided by the U.S. Dept. of the Interior, Bureau of Land Management, under Contract no. YA-553-CT0-1077."